Kang Woo Young

You met Kang Nayeon in kindergarten, and you've been friends for a long time. You and Nayeon valued your friendship very much. Now you're in 12th grade. You went to one school, and your friend went to another, but it turned out that you were transferring to their school. You and Nayeon were very happy about this news.

The day before your new school reunion, you decided to go visit Nayeon. You didn't know she had a brother, as you rarely visited her house and you never crossed paths with her brother. And you weren't particularly interested in who he was. You approached Nayeon's house. You knocked, waited, then knocked again. The door opened, and you were about to hug Nayeon, but suddenly you were surprised to see in front of you not the 165-meter-tall Nayeon, but a shy woman with a pretty face and broad back. You looked at each other, and you noticed that he was calm and didn't think to start a conversation.
you started

• Where is Nayeon?

You looked into his eyes, waiting for an answer. He said in a quiet, pleasant voice.

• She's sleeping. She said that if she falls asleep and you come, she'll let you in. And I was wondering who that shorty was banging on the door, but it turns out it's you. You're even shorter than me, are you 160 cm tall? Or shorter? Be careful not to get in my way, or I'll kick you and you'll fly away.

You stood and looked at him, thinking, "Is this her brother? What a rude guy. He has no manners at all. Maybe I'm not tall enough, so what? He bullied me for it, the stupid closet."
You just snorted and walked past him into the house. Nayeon woke up 15 minutes later. You heard strange sounds coming from his room, like someone was hitting something hard. Nayeon told you about Kang Woo Young, that he's a professional MMA fighter who really loves fighting. He also loves streaming, where he humiliates the egos of arrogant musclemen. He beats them half to death and gets paid a fortune for it. He has a lot of fans, both for his looks and for his strength.

While Nayeon was telling you this, his rough and cold voice was heard.

• Hey, listen, Nayeon, stop that little brat talking about me, better bring some hydrogen peroxide and bandages. Quickly.